Antigen specific mrna cellular cancer vaccines

ABSTRACT

Disclosed are antigen specific cancer vaccines in which immunogenic epitopes are produced intracellularly by administration of modified mRNA encoding said immunogenic epitopes. In one embodiment of the invention, said modified mRNA encodes peptides derived from the protein survivin. By directly inducing gene expression of the antigens to which an immune response is desired, immunogenic peptides are generated intracellularly, thus allowing for a wider repertoire of epitopes to be presented to the adaptive immune system, which augments likelihood of successful induction of immunity.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a non-provisional of and claims priority back to U.S. Provisional Application No. 62/165,116 filed May 21, 2015, which is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The invention pertains to the field of cancer immunotherapy, more particularly the invention relates to stimulation of immunity through the induction of gene expression for tumor antigens and tumor antigen derived epitopes utilizing chemically generated mRNA

DESCRIPTION OF THE INVENTION

The invention provides means of generating cellular therapies for cancer through the administration of mRNA that is chemically modified to allow for in vitro entry into cells. Particularly the invention teaches that mRNA encoding the survivin peptides a) STFKNWPFL (SEQ ID NO: 1); b) STFKNWPFMRYMILGLLAL (SEQ ID NO: 2); c) TTALSSTFKNWPFL (SEQ ID NO: 3); d) MASTFKNWPFAAAAAG (SEQ ID NO: 4) may be administered to dendritic cells, said dendritic cells being useful as a stimulator of anticancer immunity.

When practicing present invention it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention and do not delimit the scope of the invention.

To allow for the understanding of this invention, a number of terms are defined below. Terms defined herein have meanings as commonly understood by a person of ordinary skill in the areas relevant to the present invention. Terms such as “a”, “an” and “the” are not intended to refer to only a singular entity, but include the general class of which a specific example may be used for illustration. The terminology herein is used to describe specific embodiments of the invention, but their usage does not delimit the invention, except as outlined in the claims.

“Antigen-presenting cells” or “APCs” are used to refer to autologous cells that express MHC Class I and/or Class II molecules that present antigens to T cells. Examples of antigen-presenting cells include, e.g., professional or non-professional antigen processing and presenting cells. Examples of professional APCs include, e.g., B cells, whole spleen cells, monocytes, macrophages, dendritic cells, fibroblasts or non-fractionated peripheral blood mononuclear cells (PMBC). Examples of hematopoietic APCs include dendritic cells, B cells and macrophages. Of course, it is understood that one of skill in the art will recognize that other antigen-presenting cells may be useful in the invention and that the invention is not limited to the exemplary cell types described herein. APCs may be “loaded” with an antigen that is pulsed, or loaded, with antigenic peptide or recombinant peptide derived from one or more antigens. In one embodiment, a peptide is the antigen and is generally antigenic fragment capable of inducing an immune response that is characterized by the activation of helper T cells, cytolytic T lymphocytes (cytolytic T cells or CTLs) that are directed against a malignancy or infection by a mammal. In one, embodiment the peptide includes one or more peptide fragments of an antigen that are presented by class I MHC or class II MHC molecules. The skilled artisan will recognize that peptides or protein fragments that are one or more fragments of other antigens may used with the present invention and that the invention is not limited to the exemplary peptides, tumor cells, cell clones, cell lines, cell supernatants, cell membranes, and/or antigens that are described herein.

“Dendritic cell” or “DC” refer to all DCs useful in the present invention, that is, DC is various stages of differentiation, maturation and/or activation. In one embodiment of the present invention, the dendritic cells and responding T cells are derived from healthy volunteers. In another embodiment, the dendritic cells and T cells are derived from patients with cancer or other forms of tumor disease. In yet another embodiment, dendritic cells are used for either autologous or allogeneic application.

“Effective amount” refers to a quantity of an antigen or epitope that is sufficient to induce or amplify an immune response against a tumor antigen, e.g., a tumor cell.

“Vaccine” refers to compositions that affect the course of the disease by causing an effect on cells of the adaptive immune response, namely, B cells and/or T cells. The effect of vaccines can include, for example, induction of cell mediated immunity or alteration of the response of the T cell to its antigen.

“Immunologically effective” refers to an amount of antigen and antigen presenting cells loaded with one or more heat-shocked and/or killed tumor cells that elicit a change in the immune response to prevent or treat a cancer. The amount of antigen-loaded and/or antigen-loaded APCs inserted or reinserted into the patient will vary between individuals depending on many factors. For example, different doses may be required for an effective immune response in a human with a solid tumor or a metastatic tumor.

“Cancer cell antigen” refers to cells that have been stresses and killed in accordance with the present invention. Briefly, the cancer cells may be treated or stressed such that the cancer cell increases the expression of heat-shock proteins, such as HSP70, HSP60 and GP96, which are a class of proteins that are known to act as molecular chaperones for proteins that are or may be degraded. Generally, these heat-shock proteins will stabilize internal cancer cell antigens such that the cancer cells may include more highly immunogenic cancer cell-specific antigens.

“Contacted” and “exposed”, when applied to an antigen and APC, are used herein to describe the process by which an antigen is placed in direct juxtaposition with the APC. To achieve antigen presentation by the APC, the antigen is provided in an amount effective to “prime” the APCs to express antigen-loaded MHC class I and/or class II antigens on the cell surface.

“Therapeutically effective amount” refers to the amount of antigen-loaded APCs that, when administered to an animal in combination, is effective to kill cancer cells within the animal. The methods and compositions of the present invention are equally suitable for killing a cancer cell or cells both in vitro and in vivo. When the cells to be killed are located within an animal, the present invention may be used in conjunction or as part of a course of treatment that may also include one or more anti-neoplastic agent, e.g., chemical, irradiation, X-rays, UV-irradiation, microwaves, electronic emissions, and the like. The skilled artisan will recognize that the present invention may be used in conjunction with therapeutically effective amount of pharmaceutical composition such a DNA damaging compound, such as, Adriamycin, 5-fluorouracil, etoposide, camptothecin, actinomycin-D, mitomycin C, cisplatin and the like. However, the present invention includes live cells that are going to activate other immune cells that may be affected by the DNA damaging agent. As such, any chemical and/or other course of treatment will generally be timed to maximize the adaptive immune response while at the same time aiding to kill as many cancer cells as possible.

“Antigen-loaded dendritic cells,” “antigen-pulsed dendritic cells” and the like refer to DCs that have been contacted with an antigen, in this case, cancer cells that have been heat-shocked. Often, dendritic cells require a few hours, or up to a day, to process the antigen for presentation to naive and memory T-cells. It may be desirable to pulse the DC with antigen again after a day or two in order to enhance the uptake and processing of the antigen and/or provide one or more cytokines that will change the level of maturing of the DC. Once a DC has engulfed the antigen (e.g., pre-processed heat-shocked and/or killed cancer cells), it is termed an “antigen-primed DC”. Antigen-priming can be seen in DCs by immunostaining with, e.g., an antibody to the specific cancer cells used for pulsing. An antigen-loaded or pulsed DC population may be washed, concentrated, and infused directly into the patient as a type of vaccine or treatment against the pathogen or tumor cells from which the antigen originated. Generally, antigen-loaded DC are expected to interact with naive and/or memory T-lymphocytes in vivo, thus causing them to recognize and destroy cells displaying the antigen on their surfaces. In one embodiment, the antigen-loaded DC may even interact with T cells in vitro prior to reintroduction into a patient. The skilled artisan will know how to optimize the number of antigen-loaded DC per infusion, the number and the timing of infusions. For example, it will be common to infuse a patient with 1-2 million antigen-pulsed cells per infusion, but fewer cells may also induce the desired immune response.

The antigen-loaded DCs may be co-cultured with T-lymphocytes to produce antigen-specific T-cells. As used herein, the term “antigen-specific T-cells” refers to T-cells that proliferate upon exposure to the antigen-loaded APCs of the present invention, as well as to develop the ability to attack cells having the specific antigen on their surfaces. Such T-cells, e.g., cytotoxic T-cells, lyse target cells by a number of methods, e.g., releasing toxic enzymes such as granzymes and perforin onto the surface of the target cells or by effecting the entrance of these lytic enzymes into the target cell interior. Generally, cytotoxic T-cells express CD8 on their cell surface. T-cells that express the CD4 antigen CD4, commonly known as “helper” T-cells, can also help promote specific cytotoxic activity and may also be activated by the antigen-loaded APCs of the present invention. In certain embodiments, the cancer cells, the APCs and even the T-cells can be derived from the same donor whose MNC yielded the DC, which can be the patient or an HLA—or obtained from the individual patient that is going to be treated. Alternatively, the cancer cells, the APCs and/or the T-cells can be allogeneic.

The invention provides means of inducing an anti-cancer response in a mammal, comprising the steps of initially “priming” the mammal by administering an agent that causes local accumulation of antigen presenting cells. Subsequently, a tumor antigen is administered in the local area where said agents causing accumulation of antigen presenting cells is administered. A time period is allowed to pass to allow for said antigen presenting cells to traffic to the lymph nodes. Subsequently a maturation signal, or a plurality of maturation signals are administered to enhance the ability of said antigen presenting cell to activate adaptive immunity. In some embodiments of the invention activators of adaptive immunity are concurrently given, as well as inhibitors of the tumor derived inhibitors are administered to derepress the immune system.

In one embodiment priming of the patient is achieved by administration of GM-CSF subcutaneously in the area in which antigen is to be injected. Various scenarios are known in the art for administration of GM-CSF prior to administration, or concurrently with administration of antigen. The practitioner of the invention is referred to the following publications for dosage regimens of GM-CSF and also of peptide antigens [1-12]. Subsequent to priming, the invention calls for administration of tumor antigen. Various tumor antigens may be utilized, in one preferred embodiment, lysed tumor cells from the same patient area utilized. Means for generation of lyzed tumor cells are well known in the art and described in the following references [13-19]. One example method for generation of tumor lysate involves obtaining frozen autologous samples which are placed in hanks buffered saline solution (HBSS) and gentamycin 50 μg/ml followed by homogenization by a glass homogenizer. After repeated freezing and thawing, particle-containing samples are selected and frozen in aliquots after radiation with 25 kGy. Quality assessment for sterility and endotoxin content is performed before freezing. Cell lysates are subsequently administered into the patient in a preferred manner subcutaneously at the local areas where DC priming was initiated. After 12-72 hours, the patient is subsequently administered with an agent capable of inducing maturation of DC. Agents useful for the practice of the invention, in a preferred embodiment include BCG and HMGB1 peptide. Other useful agents include: a) histone DNA; b) imiqimod; c) beta-glucan; d) hsp65; e) hsp90; f) HMGB-1; g) lipopolysaccharide; h) Pam3CSK4; i) Poly I: Poly C; j) Flagellin; k) MALP-2; l) Imidazoquinoline; m) Resiquimod; n) CpG oligonucleotides; o) zymosan; p) peptidoglycan; q) lipoteichoic acid; r) lipoprotein from gram-positive bacteria; s) lipoarabinomannan from mycobacteria; t) Polyadenylic-polyuridylic acid; u) monophosphoryl lipid A; v) single stranded RNA; w) double stranded RNA; x) 852A; y) rintatolimod; z) Gardiquimod; and aa) lipopolysaccharide peptides. The procedure is performed in a preferred embodiment with the administration of IDO silencing siRNA or shRNA containing the effector sequences a) UUAUAAUGACUGGAUGUUC; b) GUCUGGUGUAUGAAGGGUU; c) CUCCUAUUUUGGUUUAUGC and d)

GCAGCGUCUUUCAGUGCUU. siRNA or shRNA may be administered through various modalities including biodegradable matrices, pressure gradients or viral transfect. In another embodiment, autologous dendritic cells are generated and IDO is silenced, prior to, concurrent with or subsequent to silencing, said dendritic cells are pulsed with tumor antigen and administered systemically.

In one embodiment, an mRNA sequence encoding for survivin associated peptides is introduced to a dendritic cell in order to cause production of survivin peptides in a manner in which said survivin peptides are presented in an immunogenic manner to a cell of the adaptive immune system, with a preferred embodiment being stimulation of T cells capable of mounting a cytotoxic T cell response. In one embodiment, mRNA encoding for peptides selected from a group comprising of: a) STFKNWPFL (SEQ ID NO: 1); b) STFKNWPFMRYMILGLLAL (SEQ ID NO: 2); c) TTALSSTFKNWPFL (SEQ ID NO: 3); d) MASTFKNWPFAAAAAG (SEQ ID NO: 4).

In another embodiment, administration of peptides themselves is utilized as a means of evoking an antitumor response, said peptides administered in combination with immunological adjuvants capable of augmenting type 1 immunity and reducing type 2 immunity.

Culture of dendritic cells is well known in the art, for example, U.S. Pat. No. 6,936,468, issued to Robbins, et al., for the use of tolerogenic dendritic cells for enhancing tolerogenicity in a host and methods for making the same. Although the current invention aims to reduce tolerogenesis, the essential means of dendritic cell generation are disclosed in the patent. U.S. Pat. No. 6,734,014, issued to Hwu, et al., for methods and compositions for transforming dendritic cells and activating T cells. Briefly, recombinant dendritic cells are made by transforming a stem cell and differentiating the stem cell into a dendritic cell. The resulting dendritic cell is said to be an antigen presenting cell which activates T cells against MHC class I-antigen targets. Antigens for use in dendritic cell loading are taught in, e.g., U.S. Pat. No. 6,602,709, issued to Albert, et al. This patent teaches methods for use of apoptotic cells to deliver antigen to dendritic cells for induction or tolerization of T cells. The methods and compositions are said to be useful for delivering antigens to dendritic cells that are useful for inducing antigen-specific cytotoxic T lymphocytes and T helper cells. The disclosure includes assays for evaluating the activity of cytotoxic T lymphocytes. The antigens targeted to dendritic cells are apoptotic cells that may also be modified to express non-native antigens for presentation to the dendritic cells. The dendritic cells are said to be primed by the apoptotic cells (and fragments thereof) capable of processing and presenting the processed antigen and inducing cytotoxic T lymphocyte activity or may also be used in vaccine therapies. U.S. Pat. No. 6,455,299, issued to Steinman, et al., teaches methods of use for viral vectors to deliver antigen to dendritic cells. Methods and compositions are said to be useful for delivering antigens to dendritic cells, which are then useful for inducing T antigen specific cytotoxic T lymphocytes. The disclosure provides assays for evaluating the activity of cytotoxic T lymphocytes. Antigens are provided to dendritic cells using a viral vector such as influenza virus that may be modified to express non-native antigens for presentation to the dendritic cells. The dendritic cells are infected with the vector and are said to be capable of presenting the antigen and inducing cytotoxic T lymphocyte activity or may also be used as vaccines. In the practice of the invention, it is known that dendritic cells (DC) possess unique morphology similar to neuronal dendrites and were originally identified based on their ability to stimulate the adaptive immune system. Of importance to the field of tumor immunotherapy, dendritic cells appear to be the only cell in the body capable of activating naïve T cells [20]. Accordingly, in the practice of the invention utilization of mRNA or synthetically generated survivin peptides are utilized to induce tumor immunity via T cell activation by dendritic cells. The concept of dendritic cells instructing naïve T cells to differentiate into effector or memory cells is fundamental because it places the dendritic cell as the most powerful antigen presenting cell. This implies that for immunotherapeutic purposes dendritic cells do not necessarily need to be administered at high numbers in patients. One way in which dendritic cells have been described is as sentinels of the immune system that are patrolling the body in an immature state [21, 22].

In one embodiment, utilization of molecules that are, or are similar to Damage Associated Molecular Patterns (DAMPS) are utilized ex vivo, or subsequent to in vivo administration of survivin mRNA or survivin peptide pulsed dendritic cells. Contact with said DAMPS induces the DC to migrate into the draining lymph nodes through the afferent lymphatics. During the trafficking process, DC degrade ingested proteins into peptides that bind to both MHC class I molecules and MHC class II molecules. This allows the DC to: a) perform cross presentation in that they ingest exogenous antigens but present peptides in the MHC I pathway; and b) activate both CD8 (via MHC I) and CD4 (via MHC II). Interestingly, lipid antigens are processed via different pathways and are loaded onto non-classical MHC molecules of the CD1 family [23]. The possibility of utilizing DC to stimulate immunity was made into reality in animal studies that took advantage of the ability of immature DC to potently phagocytose various antigens. If the antigens possessed DAMPs, or if DAMPs were present in the environment, the DC would mature and present the antigens, resulting in stimulation of potent T cell immunity. Accordingly, in the initial studies, immature DC were incubated with various antigens, subsequent to which a maturation signal (replicating natural DAMPs) was applied and the DC were injected into animals. Thus DC were utilized as a type of “cellular adjuvant”. Indeed, it was discovered that the classical adjuvants such as Fruend's Adjuvant actually contained a high concentration of DAMPs, which resulted in the stimulation of local DC at vaccination site in vivo.

For the purpose of practicing the invention, references are made to other clinical trials utilizing dendritic cells for stimulation of tumor specific immunity. These papers that will be described are hereby incorporated by reference. One of the first clinical applications of DC was prostate cancer. In an early reported, thirty three androgen resistant metastatic prostate cancer patients where treated with DC that were pulsed with peptides from a prostate specific antigen termed PMSA. Nine partial responders were identified based on NCPC criterial, plus 50% reduction of PSA. Four of the partial responders were also responders in the phase I study, with an average response duration of 225 days. Their combined average total response period was over 370 days. Five other responders in the secondary immunizations at the Phase II were nonresponders in the phase I study. Their average partial response period was 196 days. These data support the safety of follow-up infusion of DC that have been pulsed with tumor antigen derived peptide [24].

The same group published a subsequent paper on an additional 33 patients that had not received prior DC immunization in the Phase I. All subjects received six infusions of DC pulsed with PSM-P1 and -P2 at six week intervals without any treatment associated adverse events. Six partial and two complete responders were identified in the phase II study based on NPCP criteria, plus 50% reduction of prostate-specific antigen (PSA), or resolution in previously measurable lesions on ProstaScint scan [25]. The same group analyzed immune response in patients who had clinical remission or relapsed. A strong correlation was found between delayed type hypersensitivity response to the PSM-P1 and PSM-P2 and clinical response [26].

Another subsequent study utilized DC generated using GM-CSF and IL-4 but pulsed with PAP, another prostate antigen. Specifically, the PAP was delivered to the DC by means of generation of a PAP-GM-CSF fusion protein. Two intravenous infusions of the generated cells were performed one month apart in 12 patients with androgen resistant prostate cancer. The infusions were followed by three s.c. monthly doses of the fusion protein without cells. Treatment was well tolerated and circulating prostate-specific antigen levels dropped in three patients. Immune response to the fusion protein was observed, as well as to PAP [27].

In addition to prostate cancer, in which FDA approval has been granted for the Provenge drug, numerous trials have been conducted in a wide variety of cancers. All the trials demonstrated safety, without serious adverse effects of DC administration, as well as some degree of therapeutic efficacy. Trials have been conducted in melanoma [28-79], soft tissue sarcoma [80], thyroid [81-83], glioma [17, 19, 84-103], multiple myeloma, [104-112], lymphoma [113-115], leukemia [116-123], as well as liver [124-129], lung [130-143], ovarian [144-147], and pancreatic cancer [148-150].

Within the context of the invention, dendritic cells are utilized to stimulate specific cytotoxic T cells (CTL) targeting survivin expressing tumors. It is to be understood by the practitioner of the invention that modifications survivin mRNA or survivin peptides may be made to augment generation of CTL that are capable of killing survivin expressing tumors. CTL play an important role in eradicating tumor cells and virus-infected cells. Unlike antibodies, which bind foreign proteins in their native form, CTL recognize short fragments of intracellular antigens, 8-10 amino acids in length, complexed with MHC Class I molecules. Cytosolic peptides are transported across the endoplasmic reticulum (ER) membrane with the help of the ATP-dependent transporters associated with antigen processing (TAP). Peptides complexed with Class I molecules in the ER are then transported to the cell surface for recognition by CTL. Studies with cell lines with deficits in antigen processing, (e.g., human T2 and murine RMA-S) have confirmed that TAP proteins are intimately involved in peptide transport. Alternatively, the translocation of processed proteins from the cytosol across the endoplasmic reticulum (ER) membrane is accomplished by endoplasmic reticulum-insertion signal sequences. As soon as the signal sequence of a growing polypeptide chain has emerged from the ribosome, it is bound by the signal recognition particle (SRP) and the complex is specifically targeted to the ER membrane by an interaction with the membrane bound SRP receptor. An additional targeting pathway is the signal sequence receptor complex, which is a major protein of the eukaryotic ER membrane. While translocation usually occurs during translation, protein precursors have also been shown to be imported into the ER after their synthesis has been completed. After translocation, peptides complexed with class I molecules in the ER are transported to the cell surface for recognition by the CTL.

In one embodiment of the invention, the administration of survivin peptides together with leukocyte lysate termed “transfer factor” are utilized to induce an antitumor immune response. For the purpose of understanding the use of transfer factor therapeutically, previous publications are provided below, which are summarized and incorporated by reference.

The concept of an immunologically acting “Transfer Factor” was originally identified by Henry Lawrence in a 1956 publication [151], in which he reported simultaneous transfer of delayed hypersensitivity to diphtheria toxin and to tuberculin in eight consecutive healthy volunteers who received extracts from washed leucocytes taken from the peripheral blood of tuberculin-positive, Schick-negative donors who were highly sensitive to purified diphtheria toxin and toxoid. The leucocyte extracts used for transfer contained no detectable antitoxin. The recipient subjects were Schick-positive (<0.001 unit antitoxin per ml. serum) and tuberculin-negative at the time of transfer. All the recipients remained Schick-positive for at least 2 weeks following transfer and in every case their serum contained less than 0.001 units antitoxin at the time when they exhibited maximal skin reactivity to toxoid. The “transfer factor” that was utilized was prepared by washing packed leukocytes isolated using the bovine fibrinogen method, and washing the leukocytes twice in recipient plasma. The washed leukocytes were subsequently lysed by 7-10 freeze-thaw cycles in the presence of DNAse with Mg++. Administration of the extract was performed intradermally and subcutaneously over the deltoid area.

Given that in those early days little was known regarding T cell specificity and MHC antigen presentation, the possibility that immunological information was transmitted by these low molecular weight transfer factors was taken seriously. Transfer factors of various sizes and charges were isolated, with some concept that different antigens elicited different types of transfer factors [152, 153]. Numerous theories were proposed to the molecular nature of transfer factor. Some evidence was that it constituted chains of antibodies that were preformed but subsequently cleaved [154]. Functionally, one of the main thoughts was that transfer factor has multiple sites of action, including effects on the thymus, on lymphocyte-monocyte and/or lymphocyte-lymphocyte interactions, as well as direct effects on cells in inflammatory sites. It is also suggested that the “specificity” of transfer factor is determined by the immunologic status of the recipient rather than by informational molecules in the dialysates [155].

Burger et al [156], used exclusion chromatography to perform characterization of transfer factor. The found that specific transferring ability of transfer factor in vivo was found to reside in the major UV-absorbing peak (Fraction III). Fraction III transferred tuberculin, candida, or KLH-reactivity to previously negative recipients. Fraction III from nonreactive donors was ineffective. When the fractions were tested in vitro, we found that both the mitogenic activity of whole transfer factor and the suppressive activity to mitogen activation when present in transfer factor was found in Fraction I. Fraction III contained components responsible for augmentation of PHA and PWM responses. In addition, Fraction III contained the component responsible for antigen-dependent augmentation of lymphocyte transformation. Fraction IV was suppressive to antigen-induced lymphocyte transformation.

In 1992 Kirkpatrick characterized the specific transfer factor at molecular level. The transfer factor is constituted by a group of numerous molecules, of low molecular weight, from 1.0 to 6.0 kDa. The 5 kDa fraction corresponds to the transfer factor specific to antigens. There are a number of publications about the clinical indications of the transfer factor for diverse diseases, in particular those where the cellular immune response is compromised or in those where there is a deficient regulation of the immune response. It has been demonstrated that the transfer factor increases the expression of IFN-gamma and RANTES, while decreases the expression of osteopontine. Using animal models it has been reported that transfer factor possesses activity against M. tuberculosis, and with a model of glioma with good therapeutic results. In the clinical setting studies have reported effects against herpes zoster, herpes simplex type I, herpetic keratitis, atopic dermatitis, osteosarcoma, tuberculosis, asthma, post-herpetic neuritis, anergic coccidioidomycosis, leishmaniasis, toxoplasmosis, mucocutaneous candidiasis, pediatric infections produced by diverse pathogen germs, sinusitis, pharyngitis, and otits media. All of these diseases were studied through protocols which main goals were to study the therapeutic effects of the transfer factor, and to establish in a systematic way diverse dosage schema and time for treatment to guide the prescription of the transfer factor [157].

Numerous descriptions exist of various conditions treated with transfer factor. The majority of protocols utilized similar production procedures, essentially lysis of leukocytes and extraction of the <10 Kda fraction.

Kirkpatrick [158], described 5 anergic patients with chronic mucocutaneous candidiasis who were treated with transfer factor from donors possessing a positive delayed type hypersensitive reactions to Candida. In each recipient, the delayed skin reactions of the transfer factor donors appeared in the recipients, however no recipient developed reactivities not possessed by the donor. Prior to injection of transfer factor, in vitro stimulation of the patients' lymphocytes with antigens did not result in macrophage inhibitor factor production, however, after transfer factor this response was positive. Therapy with transfer factor alone did not have therapeutic benefit, however, in 2 patients treatment with amphotericin-B followed by transfer factor has produced cutaneous remissions of 18 months. This study is interesting in that it demonstrated what appeared to be transfer of immunity from a skin reaction perspective but not immunological clearing of disease. In a similar study, Rocklin [159], described 2 patients with chronic mucocutaneous candidiasis and a defect in cellular immunity. Both patients received a single injection of dialysable transfer factor from Candida-positive donors in an effort to reconstitute immunologic function. The transfer of cellular hypersensitivity was successful in one of the two patients and was monitored by skin tests and MIF production; however, the effect was temporary and did not change the clinical course of the patient's infection. The other patient did not respond either immunologically or clinically to transfer factor at this time, although she did respond subsequently to repeated doses of transfer factor and amphotericin B therapy. The same report described transfer factor from tuberculin-positive donors being used successfully to eradicate an infection in a patient with progressive primary tuberculosis and an acquired defect in cellular immunity. The patient had not responded clinically or bacteriologically after 7½ months of antituberculous therapy, although the organism was shown to be sensitive in vitro to the drugs she was receiving. She received 6 doses of dialysable transfer factor over a 3-month period and during this time she responded clinically, bacteriologically and roentgenographically.

An investigation into a larger number of patients, Grob [160] described a series of cases in which 409 units of transfer factor was given to 45 patients. In their report they defined one unit of transfer factor as the cell extract originating from 1-2×10(9) leukocytes. Besides local pain and occasional fever no side effects were observed. Immune conversions and beneficial clinical effects were seen in 11 and 10 patients, respectively, out of 12 patients with chronic candidiasis. Immune conversion was also observed in patients with multiple sclerosis, while the clinical effects cannot yet be judged. The series also included patients with subacute sclerosing panencephalitis, HBAg-positive disorders, various immunodeficiency diseases, malignant malanoma and miscellaneous tumours. Immune conversion occurred only occasionally and the clinical effect was either non-existent or not judgeable.

In addition to immune deficiencies and bacterial infections, transfer factor has demonstrated activity in viral infections. Given the RNA containing component of transfer factor, it may be that transfer factor induced interferon alpha production, which in turn would be responsible, in part for potential antiviral activity. Pizza et al [161], described, 33 patients with low immune response to HSV antigens and suffering from herpes ocular infections were orally treated with HSV-specific transfer factor. Their relapse index was reduced from 20.1 before treatment to 0.51 after administration, with only 6/33 patients relapsing. In another study, 20 HSV-1 patients whose disease had been treated before with other therapeutic agents (including acyclovir) were administered transfer factor and used as their own controls in terms of quantification of remissions. Transfer factor was administered subcutaneously daily for 3 to 4 days during the acute phase of the disease, and subsequently at 15-day intervals for the first 6 months; followed by a continuation of monthly injections until the termination of the study period. In 6/20 patients there was a recurrence of the disease while receiving maintenance dosages of transfer factor. These patients were again given the full initial dosage schedule and reinstated again with the maintenance dosage. The results showed an important improvement in the response to transfer factor immune modulation therapy in that a statistically significant reduction in the frequency of recurrences within a one month period was observed [162].

Supporting these observations, Meduri et al [163], reported an open clinical trial in 134 patients (71 keratitis, 29 kerato-uveitis, 34 uveitis) suffering from recurrent ocular herpetic infections. The mean duration of the treatment was 358 days. The cell-mediated immune response to the viral antigens, evaluated by the lymphocyte stimulation test and the leucocyte migration test, was significantly increased by the transfer factor treatment. The total number of relapses was decreased significantly during/after transfer factor treatment, dropping from 832 before, to 89 after treatment, whereas the cumulative relapse index dropped, during the same period, from 13.2 to 4.17.

A more recent study compared transfer factor with acyclovir in treatment of varicella herpes simplex patients. A double blind clinical trial of transfer factor compared to acyclovir was carried out in which 28 patients. Treatment was administered for seven days and the patients were subsequently submitted to daily clinical observation for an additional 14 days. An analogue visual scale was implemented in order to record pain and thereby served as the clinical parameter for scoring results. The group treated with transfer factor was found to have a more favorable clinical course, P< or =0.015. Laboratory tests to assess the immune profile of the patients were performed two days prior and 14 days after initial treatment. The results of these tests showed an increase in IFN-gamma levels, augmentation in the CD4+ cell population in the transfer factor treated group. These parameters were however insignificantly modified in patients receiving acyclovir [164].

Given the association between viruses and cancer, as well as the potent stimulation of the killer arm of the immune system by transfer factor, rationale was made to treat various malignancies with transfer factor [165]. Levin et al [166], described treatment of 18 patients with osteogenic sarcoma. Of these, 13 have had or are currently receiving injections of osteogenic sarcoma-specific dialyzable transfer factor derived from healthy donors. In three patients with very small lesions, cytotoxicity was high before amputation and decreased within 2 mo after removal of tumor. Cytotoxicity was low at time of diagnosis in all patients with large tumor masses. The cytotoxicity of the patients' lymphocytes increased after administration of tumor-specific transfer factor in all patients so treated. Patients receiving nonspecific transfer factor showed evidence of declining cell-mediated cytotoxicity. Tumor-specific transfer factor may produce an increase in cell-mediated cytotoxicity to the tumor in patients with osteogenic sarcoma. This possibility is suggested by the pain and edema that occurred in the area of the tumor in patients who had metastatic disease when therapy was started and by lymphocytic infiltrates in the tumor, as well as by the increase in cell-mediated cytotoxicity and the increase in percentage of active rosette-forming cells from subnormal to normal.

Ng et al reported a controlled study in which 6 patients with stage-IV Hodgkin's disease were given transfer factor prepared from patients with Hodgkin's disease in long remission. There was an apparent increase in cell-mediated immune responses as evidenced by a significant increase in the recipients' lymphocyte responses to phytohaemagglutinin stimulation. Three out of six patients converted to positive delayed-hypersensitivity tests [167].

In head and neck cancer a study examined 67 patients of which 40 have received immunologic transfer factor from a normal donor pool. Examination of these patients revealed that lymphocyte reactivity to nonspecific mitogrens is depressed in patients who have head and neck cancer to a much greater extent than is seen in patients with other types of tumors. Th T-lymphocyte levels increased in eight of 38 patients who received nonimmune transfer factor [168].

Krown et al [169], reported on 18 patients with advanced cancer were given subcutaneous injections of pooled dialyzable transfer factor from normal donors for periods of from 9 days to 6.5 months. Minor tumor regression was observed in only two patients. Treatment with transfer factor was associated with at least a temporary increase in delayed hypersensitivity reactions in 12 of 17 patients tested, including four patients who became responsive to 2,4-dinitrochlorobenzene. In general, in vitro tests of immune function were not changed after treatment with transfer factor except for levels of C1q, and/or C3, which were increased in 6 of 10 patients tested.\

Wagner et al [170], ran a prospective randomized double-blind study of 60 patients with invasive cervical cancer, 32 were treated with transfer factor derived from leukocytes of the patients' husbands, and 28 were treated with placebo. Within the first 2 years after radical hysterectomy, five out of 32 transfer factor-treated patients and 11 out of 28 placebo-treated patients developed recurrence of malignancy. Excluding one further patient with intercurrent death this difference is significant. Subdividing the collectives, significant differences were found in patients aged below 35 years and in patients with stage I disease. Identical immune profiles were checked in leukocyte donors prior to leukophoresis and were serially checked in patients. Antigen-specific correlations were found between donors' and recipients' reactivities but not between donors' reactivity and recipient's course of the disease.

Whyte et al [171], Reported on a patient evaluation between 1976 and 1982, 63 patients who underwent pulmonary resection, mediastinal lymph node dissection, and, when indicated by the presence of mediastinal lymph node involvement, mediastinal irradiation were randomized into two groups. Group 1 (n=28) received 1 mL of pooled transfer factor at 3-month intervals after operation; group 2 (n=35) served as controls and received saline solution. There were no statistically significant differences between the two groups with respect to age, sex, tumor histology, stage of disease, or extent of resection. One patient was lost to follow-up at 96 months; follow-up was complete in all others through July 1990. In patients receiving transfer factor, the 2-, 5-, and 10-year survival rates were 82%, 64%, and 43% respectively, whereas in controls they were 63%, 43%, and 23%. Survival in patients receiving transfer factor was consistently better than in those receiving placebo. Furthermore, survival in patients receiving transfer factor was greater at all stages of disease for both adenocarcinoma and squamous cell carcinoma. Although these long-term results were not statistically significant using survival analysis with covariates (p=0.08), they confirm our previously reported short-term findings suggesting that administration of transfer factor, either through nonspecific immune stimulation, enhancement of cell-mediated immunity, or an as yet undefined mechanism, can improve survival in patients with bronchogenic carcinoma.

Subsequent studies, even from as early as the 1970s reported that transfer factor lacks antigen specificity. For example, Dupont et al [172], reported treatment of patients with transfer factor produced by the following means: a) 450 ml of healthy donor blood was drawn; b) buffy coat leukocytes (1.6×10(9)) were collected and concentrated into 1.6 ml of packed cells; c) cells were then diluted in 4 ml saline and underwent 10 freeze-thaw cycles; d) Mg++ and DNAse was added for 30 min and incubated at 37 Celsius; e) the cell lysate was dialyzed against 500 ml of distilled water for 2 day and redialyzed again using the same procedure; f) the dialysate was lyophilized and stored at −20 Celsius, before use it was dissolved using a 0.45 micron filter. The authors reported evidence for nonspecificity in the effect of transfer factor on mixed lymphocyte culture reactivity. The data suggest that in patients with immunodeficiency disease a maturation of lymphocytes may lead to a generalized increased immune responsiveness. More profoundly, the data showed that transfer factor may induce changes in the expression of histocompatibility determinants. We observed changes in the expression of determinants capable of stimulating in the mixed lymphocyte culture reaction as well as an increase in the capacity of lymphocytes to respond. A subsequent paper also supported the concept that transfer factor may induce maturation of recipient immune cells in an antigen non-specific manner [173].

More recent studies have supported the concept that transfer factor may not act as the original notion of “transferring immunity” but as a non-specific immune modulator. One possibility is that transfer factor contains an RNA component that activates one or more of the toll like receptors. Indeed original work in the area of transfer factored seemed to demonstrate an RNAse III-sensitive activity in transfer factor [153].

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1. A cellular composition useful for induction of antitumor immunity, said composition comprising of: a) an immunogenic cell; b) preparing said immunogenic cells in a means to allow for uptake of mRNA by said immunogeneic cell; c) administering mRNA to said immunogenic cell in a manner allowing for transcription of said mRNA; and d) administering said immunogenic cell in a host in need of immune modulation.
 2. The cellular composition of claim 1, wherein said immunogenic cell is a dendritic cell.
 3. The cellular composition of claim 2, wherein said dendritic cell is in an immature state in order to allow for uptake of mRNA.
 4. The cellular composition of claim 1, wherein said mRNA encodes a tumor antigen.
 5. The cellular composition of claim 1, wherein said mRNA encodes for peptides derived from surviving.
 6. The cellular composition of claim 5, wherein said peptides are selected from a group comprising of: a) STFKNWPFL (SEQ ID NO: 1); b) STFKNWPFMRYMILGLLAL (SEQ ID NO: 2); c) TTALSSTFKNWPFL (SEQ ID NO: 3); and d) MASTFKNWPFAAAAAG (SEQ ID NO: 4).
 7. The cellular composition of claim 1, wherein said mRNA comprises a 3′ tailing sequence of linked nucleosides of approximately 140 nucleotides.
 8. The cellular composition of claim 7, mRNA comprises a 5′ terminal cap of Cap1.
 9. The cellular composition of claim 1, wherein the isolated mRNA comprises at least one chemically modified nucleoside.
 10. The cellular composition of claim 9, wherein the at least one chemically modified nucleoside is selected from the group consisting of pyridin-4-one ribonucleoside, 5-aza-uridine, 2-thio-5-aza-uridine, 2-thiouridine, 4-thio-pseudouridine, 2-thio-pseudouridine, 5-hydroxyuridine, 3-methyluridine, 5-carboxymethyl-uridine, 1-carboxymethyl-pseudouridine, 5-propynyl-uridine, 1-propynyl-pseudouridine, 5-taurinomethyluridine, 1-taurinomethyl-pseudouridine, 5-taurinomethyl-2-thio-uridine, 1-taurinomethyl-4-thio-uridine, 5-methyl-uridine, 1-methylpseudouridine, 4-thio-1-methyl-pseudouridine, 2-thio-1-methyl-pseudouridine, 1-methyl-1-deaza-pseudouridine, 2-thio-1-methyl-1-deaza-pseudouridine, dihydrouridine, dihydropseudouridine, 2-thio-dihydrouridine, 2-thio-dihydropseudouridine, 2-methoxyuridine, 2-methoxy-4-thio-uridine, 4-methoxy-pseudouridine, 4-methoxy-2-thio-pseudouridine, 5-aza-cytidine, pseudoisocytidine, 3-methyl-cytidine, N4-acetylcytidine, 5-formylcytidine, N4-methylcytidine, 5-hydroxymethylcytidine, 1-methyl-pseudoisocytidine, pyrrolo-cytidine, pyrrolo-pseudoisocytidine, 2-thio-cytidine, 2-thio-5-methyl-cytidine, 4-thio-pseudoisocytidine, 4-thio-1-methyl-pseudoisocytidine, 4-thio-1-methyl-1-deaza-pseudoisocytidine, 1-methyl-1-deaza-pseudoisocytidine, zebularine, 5-aza-zebularine, 5-methyl-zebularine, 5-aza-2-thio-zebularine, 2-thio-zebularine, 2-methoxy-cytidine, 2-methoxy-5-methyl-cytidine, 4-methoxy-pseudoisocytidine, 4-methoxy-1-methyl-pseudoisocytidine, 2-aminopurine, 2, 6-diaminopurine, 7-deaza-adenine, 7-deaza-8-aza-adenine, 7-deaza-2-aminopurine, 7-deaza-8-aza-2-aminopurine, 7-deaza-2,6-diaminopurine, 7-deaza-8-aza-2,6-diaminopurine, 1-methyladenosine, N6-methyladenosine, N6-isopentenyladenosine, N6-(cis-hydroxyisopentenyl)adenosine, 2-methylthio-N6-(cis-hydroxyisopentenyl) adenosine, N6-glycinylcarbamoyladenosine, N6-threonylcarbamoyladenosine, 2-methylthio-N6-threonyl carbamoyladenosine, N6,N6-dimethyladenosine, 7-methyladenine, 2-methylthio-adenine, 2-methoxy-adenine, inosine, 1-methyl-inosine, wyosine, wybutosine, 7-deaza-guanosine, 7-deaza-8-aza-guanosine, 6-thio-guanosine, 6-thio-7-deaza-guanosine, 6-thio-7-deaza-8-aza-guanosine, 7-methyl-guanosine, 6-thio-7-methyl-guanosine, 7-methylinosine, 6-methoxy-guanosine, 1-methylguanosine, N2-methylguanosine, N2,N2-dimethylguanosine, 8-oxo-guanosine, 7-methyl-8-oxo-guanosine, 1-methyl-6-thio-guanosine, N2-methyl-6-thio-guanosine, and N2,N2-dimethyl-6-thio-guanosine.
 11. The cellular composition of method of claim 1, wherein the isolated mRNA is formulated.
 12. The cellular composition of claim 11, wherein the formulation is a lipoplex formulation.
 13. The cellular composition of claim 11, wherein the formulation comprises a lipid and wherein the lipid is selected from DLin-DMA, DLin-K-DMA, DLin-KC2-DMA, 98N12-5, C12-200, DLin-MC 3-DMA, DODMA, DSDMA, DLenDMA, reLNPs, PLGA and PEGylated lipids and mixtures thereof.
 14. A composition for treating a cancer patient generated by: a) selecting a survivin peptide; b) admixing said survivin peptide with transfer factor; and c) administering said mixture in a patient in need of treatment.
 15. The composition of claim 14, wherein said survivin peptide is selected from a group comprising of: a) STFKNWPFL; (SEQ ID NO: 1) b) STFKNWPFMRYMILGLLAL; (SEQ ID NO: 2) c) TTALSSTFKNWPFL; (SEQ ID NO: 3) and d) MASTFKNWPFAAAAAG. (SEQ ID NO: 4)


16. The composition of claim 15, wherein said peptide is STFKNWPFL (SEQ ID NO: 1).
 17. The composition of claim 14, wherein said transfer factor is leukocyte lysate, said leukocyte lysate dialyzed to contain the <10,000 Dalton fraction.
 18. The composition of claim 14, wherein said patient is administered intradermally 100 micrograms of STFKNWPFL (SEQ ID NO: 1) peptide together with 10 micrograms of leukocyte lysate dialyzed to contain the <10,000 Dalton fraction.
 19. The composition of claim 18, wherein said composition is administered once every two weeks.
 20. The composition of claim 17, wherein said leukocytes utilized to generate said leukocyte lysate are allogeneic to the patient. 